Vacuum pump



June 21 1955 M. w. PHILLIPS 2,711,284

VACUUM PUMP Filed May 8, 1951 2 Sheets-Sheet l /o 5 o K gz) e 1 u l I. *9 ab' 3.4L l k -al 3f; z 2

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,2 Marshall WPhLZzps ATTDRN EYE June 21, 1955 M, vw, PH|| |Ps 2,711,284

VACUUM PUMP Filed May 8, 1951 2 Sheets-Sheet 2 [27j/Lg Z l zaag INVENTOR. Marshal?, Wfz/ZZ/z/ps ATTE] RN EYS United States PatentI O VACUUM PUMP Marshall W. Phillips, Lima, Ohio Application May 8, 1951, Serial No. 225,116

1 Claim. (Cl. 2250-104) This invention relates to a pump, and more particularly to a vacuum pump for exhausting air or other gases from vessels and the like.

The object of the invention is to provide a vacuum pump which will exhaust air or other gases rapidly and economically from vessels and thel like.

Another object of the invention is to provide a vacuum pump which includes a pair of Venturi sleeves through which passes a fluid medium, such as a gas, whereby this moving medium will produce a high degree of suction or vacuum that can be applied to any desired tube, conduit or vessel.

A further object of the invention is to provide a vacuum pump which is extremely simple and inexpensive to manufacture.

Other objects and advantages will be apparent during the course of the following description.

In the accompanying drawings forming a part of this application, and in which like numerals are used to designate like parts throughout the same:

Figure l is a longitudinal sectional view taken through the vacuum pump of the present invention;

Figure 2 is a sectional View taken on the line 2 2 of Figure l;

Figure 3 is a sectional View taken on the line 3-3 of Figure 1;

Figure 4 is a sectional view taken on the line 4-4 of Figure 1.

Referring in detail to the drawings, the numeral 1 designates a body which may be fabricated of any suitable material and which may have a cylindrical shape. The body 1 may be of any desired or necessary thickness, and the upper end of the body 1 is open, as at 2, the upper end of the body 1 snugly fitting into the ared end 4 of a collar 5, the body 1 and collar 5 being secured together in any suitable manner. Further, the lower end 3 of the body 1 is snugly tted in the flared end 6 of a collar 7, and the collar 7 and body 1 are secured together in any suitable manner, as for example, by welding.

The upper end 8 of the collar 5 is provided with a flat, transverse flange 9, and the flange 9 is provided with a plurality of holes or openings 10. Suitable securing elements, such as coupling bolts, are adapted to be projected through the openings 10, whereby the ange 9 can be connected to a corresponding ange on a conduit which serves to conduct the gaseous lluid medium to the inlet of the vacuum pump of the present invention, so that a vacuum will be produced. This vacuum will be applied within the conduit 11, and accordingly this vacuum will be applied to all conduits connected to the conduit 11.

The lower end 12 of the body or collar 7 terminates in or is provided with a at ange 13, and the flange 13 has a plurality of spaced holes 14 therein. The holes 14 are adapted to receive coupling bolts, whereby the ange 13 can be connected to a corresponding flange on another conduit which Will serve to conduct the gases that have passed through the tandem compounded Venturis of the pump away from the pump to thereby deliver these gases either into another vessel or out into the atmosphere.

Arranged in the body 1l is a cylindrical sleeve or jacket 15 whichv may be made of any suitable material, and the jacket 15 is provided with a longitudinally extending bore 16 of uniform diameter. The jacket 15 is adapted to snugly t within the bore 17 of the main body 1 of the pump, and the jacket 1'5 can be secured within the body 1 i'n any suitable manner, as by welding. The jacket 15 is provided with an opening or circular ho1e1 8 of a desired diameter, and the hole 18 registers with a similar hole 19 in the main body 1. These coinciding holes or openings provide a snug lit for the tubular conduit 11- which projects through these openings or apertures, the conduit 11 extending laterally outwardly from the Wall of the body 1 intermediate the ends of the latter. The conduit 11 is provided with a at flange 20, Figure 1, and the conduit 11 may be secured to the Wall of the body 1 in any suitable manner, as by welding.

The flange 20 is provided with a plurality ofy spaced openings or holes 21 which are adapted to receive coupling bolts, whereby the flange 20 can be connected to a corresponding flange or anotherftubular conduit which may be in communication with the interior of another enclosure or vessel or apparatus, wherein it is vdesired to apply a vacuum.

`The vacuumV pump of the present invention further includes a pair of Venturi sleeves 22 and 23 whichV are adapted to snugly lit within the bore 16 of the member 15, the Venturi sleeve 22 being arranged within the bore 16 just above the Venturi sleeve 23. The upper end of the Venturi sleeve 2-2 is connected, as by welding, to the upper end of the member 15. Further, the lower end of the Venturi sleeve 22 is connected to the member 15, as .by welding. The Venturi sleeve 22-is provided with two or more apertures or openings 24, Figure l, and these opening 24 are symmetrically arranged near the upper end of the Venturi sleeve 22 and these openings 24 are adapted to receive the lowerends of the tubular supporting conduits 25, which are connected to the Venturi sleeve 22. The upper ends of the conduit 2 5 terminatel within apertures 26which are arranged in the wall of the tapered tube or sleeve 27.

Arranged withinr the tube 27 is a smaller tapered tube or sleeve 28 which serves as the lower half of the primary compound Venturi, the tube 28 being arranged so that its small end 29 is above the lower small end 30 of the tapered tube 27. The lower lar-ge end 31 .of/the tapered tube 28 provides a snug t within the lower small end of the bore 32 of the tapered tube 27. The tube 28 is joined to the tube 27, as by welding, around the periphery ofthe junction of these two tapered tubes, as at 33, to provide an annular weld.

The pump of the present invention further includes Ya cupped body 34 which provides a Venturi throat 35, the body 34 being arranged centrally in the upper portion of the tapered tube 27. The downward protruding lower end of the cupped body 34 does not contact the upper end of the small` tapered tube 27, whereby an annular aperture or opening 36 is' provided. The opening 36 provides a communication between the throat 35 of the Venturi and the void interior or chamber 37. IThe chamber 37 is defined between the compositely lformed Venturi 34 and 28, and the bore of the large tapered tube 27. Further, the interiors 38 of the tubular supporting conduits 25 in turn communicate with the chamber or void space 39, the chamber 39 being defined by the Venturi sleeve 22 and the wall of the member 15. Further, since the chamber 39 communicates' with the interior 40 of the tubular conduit 11, it is apparent that the interior of the compound Venturi throat 35 is in communication with the interior 40 of the tubular ,conduit 11. The Vens turi which consists of the parts 34 and 28 is positioned centrally in the cylindrical body and has its lower portion protruding downwardly within the throat 41 of the Venturi sleeve 22, and this is known as the first compound Venturi of the vacuum pump. The upper outer peripheral edge of the cupped body 34 is securely fastened by welding to the upper end of the large tapered tube 27.

The vacuum pump of the present invention further includes a second tandem Venturi which includes the sleeve 23 that is arranged within the bore 16 of the cylindrical body 15, the upper end of the sleeve 23 being in contact with the lower end of the first tandem Venturi sleeve 22. The upper end of the Venturi sleeve 23 is secured to the wall of the cylindrical body 15 by welding or other means. The lower end portion 42 of the Venturi sleeve 23 is connected to the wall of the lower end portion of the cylindrical body 15 in any suitable manner, and the lower portion of the Venturi sleeve 22 is provided with a plurality of apertures or openings 43, Figures 1 and 4. The openings 43 serve to receive therein the outer ends of the tubular supporting conduits 44 which are connected to the Venturi sleeve 22.

The inner ends of the tubular supporting conduits 44 terminate within apertures or openings 45 which are arranged in the wall of the tapered sleeve or tube 46. A smaller tapered sleeve or tube 47 is inserted with its smaller end 48 extended upwardly through the lower smaller end 49 of the tapered tube 46. The lower larger end 50 of the smaller tapered tube 47 is provided with suficient diameter to afford a snug fit within the lower smaller end portion of the bore 51 of the tapered tube 46.

There is further provided an internally cupped body 52 which forms a Venturi throat 53, and the cupped body 52 is centrally positioned within the upper portion of the tapered tube 46. The downwardly projecting lower end of the cupped body 52 does not Contact the upper end 48 of the small tapered tube 47 which is centrally positioned within and welded to the larger tapered tube 46. Thereforo, the annular aperture or opening 54 is provided, and the opening 54 affords chamber 5S communication with the interior 53 of this second compound Venturi (members 52 and 47). The Venturi cupped body 52 coacts with the tapered sleeve or tube 47 to provide the throat 53. A chamber 55 is provided between the compositely formed Venturi 52 and 47, and the bore of the large tapered tube 46. Also, since the interiors 56 of the tubular supporting conduits 44 are arranged in communication with the chamber 55, and since the interiors 56 of the tubular conduits 44 are at the same time in communication with the chamber 39, and since the chamber 39 communicates with the interior 40 of the tubular conduit 11, it will be seen that the throat 53 of the second compound Venturi 52 and 47 communicates with the interior 40 of the tubular conduit 11. The tubular conduit 11, as previously pointed out, also communicates with the interior of the first compound Venturi 34 and 28.

The vacuum pump of the present invention utilizes the kinetic energy of a gaseous body of rapidly flowing fluid medium within the confines of the device to produce an appreciable amount of vacuum which, through the medium of suitably arranged conduits or pipes, may be readily applied in any manner to any attendant device, or vessel, to which it may be desirable to supply a vacuum. The gaseous fiuid medium which continuously and rapidly flows in the proper direction through the tandem compounded Venturis of. the pump may be a single gas or a mixture of two or more gases, steam, or a mixture of steam and two or more other gases.

In use, fluid, such as a gaseous medium, passes from a suitable source of supply through the collar 5, then through the throat 35. As this rapidly moving fluid medium passes through the throat 35, a vacuum is created in the conduit 11. Thus, the opening 36 connects the throat 35 with the chamber 37, while the chamber 37 is connected to the chamber 39 by means of the tubes or conduits 25. After the gaseous medium leaves the bottom of the tube 28, this moving fiuid medium enters the Venturi therebelow. Thus, the iluid passes through the throat 53, whereby a vacuum is created in the chamber through the opening 54. The tubes 44 connect the chamber 55 to the chamber 39 so that the fluid passing through the throat 53 also helps create an additional vacuumatic effect in the conduit 11. Finally, the fiuid medium leaves the pump through the outlet collar 7. Further, it

compound Venturis 34, 28 and 52, 47. Venturi sleeve 22 serves to produce an increase or boost in the vacuum produced within the throat 35 of the compound Venturi 34, 23 by reducing the pressure in the lower extremity of the compound Venturi 34, 28, and thereby increasing the rate of fiow of the iiuid medium through the Venturi 34, 7.8. Likewise the flow of' fiuid medium through Venturi sleeve 23 reduces the pressure at the lower extremity of compound Venturi 52, 47, and in so doing increases the rate of dow of iiuid medium through the throat of compound Venturi 52, 47 and thereby increases the vacuum produced within the Venturi 52, 47.

What is claimed is:

In a vacuum pump, a main cylindrical body having a uniform bore and having its opposite ends open, a flared collar secured to each end of said main body, the ends of said main body being a close push-fit in the larger flared ends of said collars, a liner having its opposite ends open snugly seated in the uniform bore of said main body, said liner being provided with an aperture intermediate its ends, there being an aperture in said main body in alignment with the aperture in said liner, a vacuum conduit extending through said aligned apertures and secured to said main body, said conduit extending laterally outward from the interior of said liner and said main body, a flattened base flange secured to the outer end of said conduit, a first Venturi sleeve positioned in the upper portion of said liner and providing an annular chamber, said chamber being defined by the wall of said Venturi sleeve and the wall of said liner, said chamber being in communication with the interior of said vacuum conduit, a second Venturi sleeve positioned in the lower portion of said liner and being arranged contiguous toV said first Venturi sleeve, a first compound Venturi positioned in said first Venturi sleeve and provided with an annular passage, a jacket surrounding said rst compound Venturi and provided with apertures, said jacket being spaced from said first compound Venturi forming an annular chamber extending around said annular passage, said first compound Venturi having an opening therein providing communication between said annular chamber and said annular passage, a pair of supporting conduits having their inner ends snugly seated in the apertures in said ljacket, apertures arranged in the upper portion of the wall of the first Venturi sleeve for receiving the outer ends of said supporting conduits, said supporting conduits providing a communication means between said first compound Venturi and the chamber disposed between the first Venturi sleeve and said liner, said last named chamber and supporting conduits providing a means of communication between said first compound Venturi and said vacuum conduit and therefore to a body to be evacuated, a second compound Venturi positioned in the lower portion of said first Venturi sleeve and also in the second Venturi sleeve, a jacket surroundingsaid second compound Venturi and provided with apertures therein, said jacket being spaced from said second compound Venturi forming an annular chamber therebetween, a pair of supporting conduits having their inner ends provided with a close fit within the apertures located in the wall of the jacket that surrounds the second compound Venturi, apertures formed in the lower portion of the wall of said first Venturi sieeve, the last-named supporting conduits having their outer ends provided with a close fit within said last 5 6 u mentioned apertures and means providing communica- 1,529,774 Delas Mar. 17, 1925 tion between said second compound Venturi and the an- 1,842,378 Goldsch Jan. 26, 1932 nular chamber surrounding same. FOREIGN PATENTS References Cited in the le of this patent 5 849,896 France Aug.` 9, 1938 UNITED STATES PATENTS 597,212 Ahrbecker Jan. 11, 1898 

